Seattle / Tacoma (SEA) to Boston (BOS) flight deal in economy from $273
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
BOSLogan International Airport
Boston, United States
$412 USD
-34%$273 USD
Verified 18 days agoAugust 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Limited Availability
16% of dates checked are available within 10% of the lowest price
Thursday, August 13th, 2026
6 round-trip options
Returning
Thu, Aug 20, 2026•7 Day Trip
$367 USD
Returning
Fri, Aug 21, 2026•8 Day Trip
$367 USD
Returning
Sat, Aug 22, 2026•9 Day Trip
$387 USD
Returning
Mon, Aug 24, 2026•11 Day Trip
$351 USD
Returning
Wed, Aug 26, 2026•13 Day Trip
$342 USD
Returning
Thu, Aug 27, 2026•14 Day Trip
$351 USD